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All results from a given calculation for CH3NC (methyl isocyanide)

using model chemistry: MP4/3-21G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C3V 1A1
Energy calculated at MP4/3-21G
 hartrees
Energy at 0K-131.470397
Energy at 298.15K-131.472753
HF Energy-131.153643
Nuclear repulsion energy58.640785
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at MP4/3-21G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3047 2955        
2 A1 1979 1919        
3 A1 1494 1449        
4 A1 875 848        
5 E 3122 3028        
5 E 3122 3028        
6 E 1570 1522        
6 E 1569 1522        
7 E 1175 1140        
7 E 1175 1140        
8 E 268 260        
8 E 268 260        

Unscaled Zero Point Vibrational Energy (zpe) 9832.1 cm-1
Scaled (by 0.9698) Zero Point Vibrational Energy (zpe) 9535.2 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at MP4/3-21G
ABC
5.20437 0.31855 0.31855

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP4/3-21G

Point Group is C3v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 -1.142
N2 0.000 0.000 0.318
C3 0.000 0.000 1.524
H4 0.000 1.035 -1.505
H5 0.896 -0.518 -1.505
H6 -0.896 -0.518 -1.505

Atom - Atom Distances (Å)
  C1 N2 C3 H4 H5 H6
C11.45972.66621.09691.09691.0969
N21.45971.20652.09612.09612.0961
C32.66621.20653.20113.20113.2011
H41.09692.09613.20111.79281.7928
H51.09692.09613.20111.79281.7928
H61.09692.09613.20111.79281.7928

picture of methyl isocyanide state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 N2 C3 180.000 N2 C1 H4 109.326
N2 C1 H5 109.326 N2 C1 H6 109.326
H4 C1 H5 109.616 H4 C1 H6 109.616
H5 C1 H6 109.616
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability